First, due to low temperature and dry air, the blood circulation of skin mucosa is poor, there are no sebaceous glands around the lips, and a protective sebum membrane cannot be formed. The cuticle of the lips is extremely thin, so it is difficult to retain water, so it is prone to dryness, peeling and chapping in winter.

Second, the red area around people's lips is called "lip red edge", and its wetness is maintained by local rich capillaries and a small amount of underdeveloped sebaceous glands. Due to the low humidity and windy sand in autumn, the blood circulation of human skin and mucosa is poor. If you eat less fresh vegetables, the human body will suffer from insufficient nutrient intake, and it will dry up.

Third, lack of vitamins leads to chapped lips. Lack of vitamin b2 will affect the biological oxidation of human body, which is prone to glossitis, cheilitis and keratitis. When the temperature and relative humidity are too low, the deficiency of vitamin b2 will be more obvious.

Fourth, bad habits lead to. Adding lips in winter will make lips drier and drier, while licking lips can only bring temporary moisture. When the water in these lips evaporates, it will take away more water inside the lips, and make the lips fall into a vicious circle of "dry licking-dry licking-licking again". As a result, the more you lick, the more painful it is, and the more you lick, the more cracked it is.

Fifth, people who are allergic to certain cosmetics or sunlight, people who are prone to get angry due to excessive mood swings, and the osmotic pressure of tissue fluid in human body caused by certain diseases (diabetes) decreases, which leads to excessive drainage and water shortage of tissue fluid, and spicy stimulation of tobacco and alcohol is easy to cause chapped lips.

The above is the introduction of the causes of chapped lips. We can know that chapped lips mostly occur in cold winter. Therefore, in this season, friends should pay more attention to the maintenance of lips to prevent chapped lips.

There are the following methods for chapped lips:

First, protect the temperature and humidity of your lips, wear a mask when you go out and avoid the cold wind.

Second, protect your lips with moisturizing things. You can apply a small amount of sesame oil, glycerin or oily lip balm. Honey has a good moisturizing and skin rejuvenation effect, and can be gently applied to the lips for 20 minutes every night.